1320138250 has 16 divisors (see below), whose sum is σ = 2471299272. Its totient is φ = 528055200.

The previous prime is 1320138241. The next prime is 1320138263. The reversal of 1320138250 is 528310231.

It can be written as a sum of positive squares in 4 ways, for example, as 292102281 + 1028035969 = 17091^2 + 32063^2 .

It is a super-2 number, since 2×1320138250² = 3485529998226125000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2640027 + ... + 2640526.

Almost surely, 2^1320138250 is an apocalyptic number.

1320138250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1320138250 is a deficient number, since it is larger than the sum of its proper divisors (1151161022).

1320138250 is an equidigital number, since it uses as much as digits as its factorization.

1320138250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280570 (or 5280560 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1320138250 is about 36333.7068023619. The cubic root of 1320138250 is about 1096.9996058418. Note that the first 3 decimals are identical.

Adding to 1320138250 its reverse (528310231), we get a palindrome (1848448481).

The spelling of 1320138250 in words is "one billion, three hundred twenty million, one hundred thirty-eight thousand, two hundred fifty".